Is Mortgage Interest Tax Deductible in 2026? How to Claim It and What You Can Deduct

Run the Math Test Before You Assume the Deduction Helps

Every borrower situation is different, and that's especially true here. A lot of homeowners hear "mortgage interest is deductible" and assume it's a line item that automatically shaves money off their tax bill. It doesn't work that way. The deduction only has value if everything you'd itemize, mortgage interest included, adds up to more than the standard deduction.

For most filers, the standard deduction is $16,100 if single and $32,200 if married filing jointly. If your mortgage interest for the year comes to $9,000 and you don't have much else to itemize, you're not clearing that bar. You'd take the standard deduction anyway, and mortgage interest never touches your return.

This is a conversation I have with borrowers more often than you'd think. Someone hears their neighbor "wrote off" their mortgage interest and assumes the same will happen for them. Shopping with someone else's tax situation is a lot like shopping with someone else's bank account. Your neighbor might have a bigger loan or years of charitable contributions stacking on top. You might have none of that. The same rule applies to both of you, and it can still produce two completely different outcomes depending on what else is on your return.

Who Actually Benefits and Who Usually Doesn't

I like to frame it as two columns, which is the same question an AmeriSave loan officer walks through with borrowers comparing loan structures at tax time and throughout the life of the loan.

You probably benefit if you have a larger loan balance, you're early in your term when interest makes up most of each payment, or you already itemize for other reasons like state and local tax or charitable giving. Stack enough of those together and your itemized total climbs past the standard deduction fairly easily.

You probably don't benefit if your balance is modest, you're several years into your term, or mortgage interest is close to your only itemizable expense. In that case, the standard deduction usually wins without a fight.

The deduction is naturally biggest in a loan's early years and shrinks every year after, because amortizing loans front-load interest and back-load principal. If you're two years into your loan, your deduction picture looks very different than it will eight years in, even with an identical original loan amount. Run the numbers for where you'd actually be in year one instead of relying on an average across the life of the loan.

What the Acquisition Debt Cap Actually Means for Your Loan

Once itemizing makes sense, the next question is how much of your interest qualifies. This is where the acquisition debt limit comes in, and for most buyers it's a non-issue.

Homeowners can deduct interest on up to $750,000 of acquisition debt, the amount borrowed to buy, build, or substantially improve the home securing the loan. Married filing separately cuts that cap in half, to $375,000 each. Older loans that predate the current rule structure carry a higher grandfathered limit of $1,000,000, or $500,000 if filing separately, and that higher cap can carry forward through a refinance.

I don't spend much time on this cap with most borrowers because it only binds once your balance is north of $750,000, and that's not where most first-time and move-up buyers land. Under that threshold, the entire loan's interest qualifies, assuming you clear the itemizing test in the first place.

Home equity debt has its own wrinkle. That interest is only deductible if the money went toward buying, building, or substantially improving the home securing it. Pull equity out to consolidate credit cards or cover a family expense, and it generally isn't deductible, even though the loan is secured by your house.

How to Actually Claim the Deduction, Step by Step

Assuming the math works in your favor, claiming the deduction follows a specific sequence. First, your lender sends Form 1098, the Mortgage Interest Statement, once you've paid $600 or more in mortgage interest for the year. You don't request it; it arrives, typically by the following January, and it's the document your return relies on for the exact figure.

Second, you decide to itemize instead of taking the standard deduction. This isn't automatic: you or your tax preparer total every itemizable expense, mortgage interest, state and local taxes up to their cap, charitable contributions, and anything else that qualifies, then compare that total against your standard deduction. Third, you report the Form 1098 figure on Schedule A, which attaches to your Form 1040. Reporting that figure on Schedule A is the step that actually lowers your taxable income.

One more layer worth knowing: broader tax law changes locked in the $750,000 cap permanently and added a new limit on the tax value of itemized deductions for top-bracket taxpayers. For most first-time and move-up buyers, that provision won't come into play.

Don't Let the Deduction Drive the Decision

If there's one thing I'd want you to walk away with, it's this: don't size a loan around an assumption that the mortgage interest deduction will offset a meaningful chunk of your tax bill. For a lot of homeowners, especially those with smaller loans or not much else to itemize, the deduction changes nothing on the return.

Run your actual numbers. Add up what you'd itemize, mortgage interest and everything else, and compare it against your standard deduction. If it clears the bar, claiming it's straightforward: get your Form 1098, itemize on Schedule A, and let the number do its work. If it doesn't clear the bar, that's useful too, since your loan decisions should rest on payment, rate, and terms rather than a tax benefit that may never show up. AmeriSave can help you weigh how a given loan amount affects your long-term costs, but the deduction math is worth running first.